Open Data Task

An Open Data task is used to open a dataset for a session, so that the data can be processed by other tasks in the session.

An Open Data task is always placed at the top of a session, so that it is performed first.

Note: Multiple data stores can be used by adding multiple Open Data tasks.

For each Open Data task, a data store must be defined.

If the data store is OVM workspace enabled, you can enter a workspace name in the OWM Workspace field (see Accessing Versioned Data).

Topology can also be enabled or disabled for each data source (see Topology).

Note: Selecting Session Extent Override will allow you to override the session extent. For more, see Session Extent Override Options below. For more on session extents, please see Opening Data.

By default, an Open Data task accesses all classes included in the Input Mapping (see Input Mapping). To override this, un-check the All Classes checkbox within the task, and select the required classes from the list that appears.

Note: Refresh the list if you have added or removed classes from the input mapping since the data store was selected in this session.

ClosedAdd an Open Data Task to a Session

  1. Navigate to the Sessions workspace.

  2. From the Navigation Pane, select a session to edit.

  3. Open the Tasks tab.

  4. Click New and select Open Data.

  5. In the Select Data Store dialogue that appears, select the data store to be used.

  6. Click OK.

  7. If you want all classes to be used, leave All Classes checked.

    If not, un-check the box and select from the list of classes that appears.

  8. Click Save.

ClosedSession Extent Override Options

When defining an Open Data task you can choose to override the session extent. To do so, select one of the following options from the Session Extent Override drop down list:

Option Description
Leave Blank Do not override the session extent. Default behaviour.
Extent of Previous

Restricts data to the convex hull of all previously opened data.

Note: This option is not available if there are no previous Open Data tasks in the session.
Open All

Overrides any session set extent and opens all data.

Example:  

If a session is restricted by a polygon, selecting Open All will override this and open all of the available data contained in the data store.

Open Data Task Results

Once a session is run, a completed Open Data task provides an XML results file detailing the data opened and the number of errors that may have occurred.

A screenshot showing a completed open data task.

A completed Open Data task

Clicking on the Summary link allows you to save or view the XML results.

A screenshot of the XML results for an open data task.

Example Open Data task XML results